Maintenance Active Corrosion Protection System Your boat may be equipped with a Volvo Penta active corrosion protection system (APC). This system oper- ates with very little current drain from the boat’s elec- trical system. It keeps the voltage potential in the area around the drive unit in a range that is not corrosive to aluminum. (This is accomplished by changing the charge of water molecules so that they do not remove electrons from the drive unit’s metal parts to cause corrosion.) If you do not have an active corrosion pro- tection system already installed, you may purchase one from your authorized Volvo Penta dealer.
The protection system’s control box has both red and green LED indicator lights ( A ). The lights will indicate the amount of protection that the unit is providing to protect the sterndrive and transom shield. The ACP system is designed to protect one sterndrive and tran- som shield assembly. If copper based antifouling paint is used or the drive is installed on a metal hull, the unit may be inadequate to protect the drive and transom shield. 7743722 - Downloaded from www.volvopenta.com 13/05/2008 20:17:06 22251 1. The green LED ( 1 ) indicates the unit is ade- quately protected. 2.
If the green and red LEDs ( 2 ) are illuminated, the drive is protected but the system is drawing maxi- mum power (between 3 to 150 mA) to protect the drive unit. Check the following conditions and solutions. ‰ Water too severely contaminated or polluted. Install additional anode on the transom and ground to drive unit. 22863-1.gif ‰ Too much unpainted metal on the drive or transom shield. Clean and paint exposed metal on drive and transom shield. Please re- fer to the section entitled Propeller Care on page 98 for paint repair procedures. ‰ Corroded, missing, or painted anodes. Serv- ice or replace anode as required. ‰ Stray current from shore power or surround- ing boats.
Disconnect shore power, wait 8 hours and recheck. If still present, temporarily relocate boat to another area away from the marina and check again. 22863-2.gif ‰ Loose or corroded terminals on the electronic unit or battery. Clean and tighten connectors. ‰ Copper bottom paint used and is in contact with the transom shield. Remove paint and ensure there is a 25mm (1 in.) border be- tween transom shield and bottom paint. VPA 7743722 English 10-2004 95